Has anyone seen one of these machines that leaves a black background and a repetitive line every 45mm. The fault only occurs on full colour prints and does not show at all on b/w only prints.
I have swapped a Black dev and drum into the machine for no change and also the transfer belt from a working machine.

This machine came to us with a blown power supply and delaminated fuser belt.

I am beginning to wonder if there may be a fault on the main high voltage PCB.

Any suggestions?

I have since swapped all 4 drums all 4 dev tanks and the main HV pcb still no luck. am about to swap complets transfer drive in case is a gear related issue